Electrical heating unit for drying apparatus



1,629,943 May 1927' L. H. ZEUN ELECTRICAL HEATING UNIT FOR DRYINGAPPARATUS Filed March 25, 1925 2 Sheets-Sheet l &

IN V EN TOR.

1,629,943 May 24, 1927. L H. ZEUN ELECTRICAL HEATING UNIT FOR DRYINGAPPARATUS 25 1925 heat 2 I N VEN TOR.

ZOUIJHIZVM RNE Patented May 24, 1927.

UNITED STATES 4 1,629,943 PATENT OFFICE.

LOUIS H. ZEUN, OF BALTIMORE, MARYLAND, ASSIGNOR- TO JOHN B ADT COMZPARY,OI BALTIMORE, MARYLAND.

ELECTRICAL HEATING UNIT FOR DRYING APPARATUS.

Application filed March as, 1925. Serial m. 18,088.

My invention relates to certain new and useful improvements in dryingapparatus and is particularly analogous to that type of drying apparatusillustrated 1n co-pen'd- 5 ing application filed December 23, 1924,executed September 25, 1924, Serial No. 757

648, and assigned to the John B. Adt Company of Baltimore, recorded inliber L423,

page 124. It is the particular object of this invent on to provide theheating drum of the drylng apparatus with an integral heatlng unit thatis rotatable with the drum and material carried in the drum.

A further object of the invention is to provide a rotating materialcarrymg drum with a plurality of relatively spaced electrlc heatingunits secured to and formlng a part of the drum, so as to be rotatabletherewith.

A further object of the inventlon 1s to provide a drying apparatus witha rotating material carrying drum having fixed thereto and rotatabletherewith, a plurality of electric heating units, which heating unitsare so arranged on the interior of the drum as to radiate heat both tothe interior of the drum and the housing surrounding the same.

A further object of this invention is to provide a drying apparatus fortobacco and like material, havlng a rotating heat ng drum carryingelectrical heating units, which are of such construction as to render itpossible to manufacture the apparatus at a comparatively small cost.

A still further and more important ob ect of this invention is theprovision of a rotating drum for drying apparatus provlded with suitableelectrical heating units carried by baflles on the interior of the drum.

Withthese and other objects in view, the invention consists in certainnovel features, combination and arrangement of parts as will behereinafter more fully described,

(5 pointed out in the drawings, and claimed.

In the drawings,

Figure 1 is a vertical transverse sectlonal view of the dryin apparatus,showin the rotating drum an relative position 0 the heating units asmade in accordance with my invention,

Figure 2 is a fragmentary longitudinal sectional view of the rotatingdrum and heating units, and,

Figure 3 is a fragmentary side elevatlonal view of the rotating heatingdrum, showing the air outlets.

Like numerals of reference designate corresponding parts throughout theseveral views of the drawings.

Referring to the drawings, the numeral 5 indicates a drum housing andthis housing 5 supports a rotating drum 6. The housing 5 is identical inconstruction in every detail with that construction set forth in myco-pending application, Serial No. 757,648, filed December 23, 1924, andas the construc tion of my co-pending application and the present one isidentical, and inasmuch as the ousing and the support for the drum formsno part of this invention, specific detail or mentioning of the same isomitted.

The particular invention embodied in this application is the provisionof the rotating drum 6, which is provided on its interior with aplurality of relatively spaced sup porting elements 7. The supportingele ments 7, as here shown, are substantially V- shaped and have theterminals of their open end portions secured to the interiorcircumference of the drum at regular spaced intervals, as at 8. Securedwithin these supports 7, are electrical heating units 9, and these unitsmay be in as many series as desired, or if necessary, can be onecomplete unit for each support 7.

The supports 7 also constitute bafiles for the material which is placedin the rotating drum 6.

Secured between each suport 7, is an auxiliary support 10, which liasone end secured to the support 7 and its opposite end secured to theinterior circumference of the drum 6, and each of these auxiliarysupports 10 has secured thereto an electrical heating unit 11, of thesame configuration as the heat unit 9. Y o

The drum 6 is provided with a series of air or heat openings 12, suchopening 12 being located directly opposite each of the heating units 9and 11, respectively, and the purpose of these openings 12 is to permitthe heat to pass from the units into the housing 5 and circulate throughthe material carried thereby.

The particular-operation of this apparatus is identical with that in myco-pending application above referred to. The material is fed into ahopper at the end of the drum, which has been properly heated bothint'eriorly and exte-riorly by the heating units 9 and 11, which are anintegral part of the drum. The material sliding about the interior ofthe drum during its rotation, not only gets the benefit of the heatradiating from the baflies, or supports 7 and 10, but also receives thebenefit of the additional heated air passing from the housing throughthe drum. Thus, the material is thoroughly dried due to the fact thatthere is a continuous inner heat flowing from the units and a continuousflow of dry air about the drum and through the drum from the housing,which will rapidly remove the enerated moisture, and the material isdlscharged from the drum in the manner explained in my co-pending aplication.

It is to be un erstood that the articular construction of the supportsor ba es 7 and l. 10, is of no material consideration, the pre' ferredembodiment of this invention being the provision of electric heatingunits carried by the drum and rotating therewith.

Having thus described my invention, what I claim as new is:

1. A drying apparatus including a housing, a rotatin drum mounted insaid housing, a plurality of electrical heating units formed integralwith the interior of said drum, and said drum provided with heat outletsopposite each of said electrical heating units.

2. A drying apparatus comprising a housing having a rotating drummounted therein, a pluralit of relatively spaced supports formed on t einterior of said drum, and constituting bafiles, electrical heatingunits carried by each of said supports, and said drum having openings topermit heated air to pass into said housing and back into said drum.

3. A drying apparatus including the combination with a housing having arotatin drum mounted therein, said drum provide with a lurality ofopenings at relatively spaced istances apart, and electrical heat unitscarried on the interior of said drum and located directly opposite eachof said openings for the purpose specified.

In testimony w ereof he hereunto afiixes his signature.

LOUIS H. ZEUN.

